142 ZOOLOGY 
distinct ganglia in each somite, the stomodaeal muscular bulb is 
armed with three teeth, and the sexes are separate. 
ZN Rei 
LAK 
A 
10 002C ony 
Tel BIT: 
ney 
SS 7 
Pe { 
Tider 
——— 
is} 
12 
12S 
Fic. 90.—Polygordius neapolitanus. 
A. Transverse section of a male Poly- 9. Oblique muscular septum covered 
gordius, with coelomic epithelium. 
1. Cuticle. 10. The testes. 
2. Ectodermic epithelium. 11. Ventral nerve cord, continuous 
3. Muscle plates. with 2. 
4. Parietal coelomic epithelium. B. A spermatozoon. : 
5. Visceral coelomic epithelium. C. Horizontal section of a mature female 
6. Ciliated endodermal epithelium. Polygordius. 
7. Dorsal blood-vessel in dorsal mesen- 1, 2, 3, and 6as in A. 
tery. 12. The septa. 
8. Ventral blood-vessel in ventral 13. Ova. 
mesentery. 
The body-wall has undergone partial histological degeneration, and is ruptured in 
two places to allow the escape of the ova (13) which crowd the coelomic space. 
Polygordius is the largest of the Archiannelids. PP. 
lacteus is 40 mm. long (Fig. 89). The longitudinal ventral 
